The shell is smooth on the inside.
贝壳内壁光滑。
The coat was smooth and shiny inside like her sister Sylvia's blouses.
外套里面光滑发亮，就像她姐姐西尔维亚的衬衫。
Smooth airflow:A fan inside the cabinet achieves smooth wind circulation for even temperature.
平稳气流：向内靠风扇送冷风，可以达到一个平稳的温度；
Smooth airflow:A fan inside the cabinet achieves smooth wind circulation for even temperature.
平稳气流：向内靠风扇送冷风，可以达到一个平稳的温度；
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